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CharonChuiCharonChui
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‎VideoDevelopment/OpenGL/11.OpenGL ES滤镜.md‎

Lines changed: 279 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -90,9 +90,286 @@ RGB三个通道的颜色取反，而alpha通道不变。
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- onDestroy()：销毁，用于资源回收。
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```java
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public class BaseFilter {
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private static final int POSITION_COMPONENT_COUNT = 2;
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private static final int TEXTURE_COMPONENT_COUNT = 2;
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protected int mProgram;
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@RawRes
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private int mVertexShaderResId;
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@RawRes
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private int mFragmentShaderResId;
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private boolean mInited;
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private int vertexPosition;
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private int texturePosition;
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private int samplerTexturePosition;
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//渲染线程
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private LinkedList<Runnable> mRunOnDraw = new LinkedList();
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public BaseFilter() {
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this(R.raw.video_no_filter_vertex_shader, R.raw.video_no_filter_fragment_shader);
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}
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public BaseFilter(@RawRes int vertexShaderResId, @RawRes int fragmentShaderResId) {
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mVertexShaderResId = vertexShaderResId;
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mFragmentShaderResId = fragmentShaderResId;
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}
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public void init() {
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if (!mInited) {
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onInit();
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mInited = true;
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onInited();
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}
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}
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public void onInit() {
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handleProgram(MyApplication.getInstance(), mVertexShaderResId, mFragmentShaderResId);
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vertexPosition = glGetAttribLocation("vPosition");
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texturePosition = glGetAttribLocation("vCoordPosition");
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samplerTexturePosition = glGetUniformLocation("uSamplerTexture");
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}
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/**
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* readResource -> compileShader -> linkProgram -> useProgram
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*
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* @param context
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* @param vertexShader
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* @param fragmentShader
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*/
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protected void handleProgram(@NonNull Context context, @RawRes int vertexShader, @RawRes int fragmentShader) {
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String vertexShaderStr = ResReadUtils.readResource(context, vertexShader);
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int vertexShaderId = ShaderUtils.compileVertexShader(vertexShaderStr);
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//编译片段着色程序
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String fragmentShaderStr = ResReadUtils.readResource(context, fragmentShader);
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int fragmentShaderId = ShaderUtils.compileFragmentShader(fragmentShaderStr);
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//连接程序
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mProgram = ShaderUtils.linkProgram(vertexShaderId, fragmentShaderId);
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//在OpenGLES环境中使用程序
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GLES30.glUseProgram(mProgram);
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}
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public void onInited() {
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}
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public final void destroy() {
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mInited = false;
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GLES30.glDeleteProgram(mProgram);
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onDestroy();
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}
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public void onDestroy() {
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}
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public void onDraw(final int textureId, final FloatBuffer mVertextBuffer,
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final FloatBuffer mTextureBuffer) {
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runPendingOnDrawTasks();
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if (!mInited) {
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return;
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}
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glVertexAttribPointer(vertexPosition, POSITION_COMPONENT_COUNT, GLES30.GL_FLOAT, false, 0, mVertextBuffer);
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glVertexAttribPointer(texturePosition, TEXTURE_COMPONENT_COUNT, GLES30.GL_FLOAT, false, 0, mTextureBuffer);
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GLES30.glEnableVertexAttribArray(vertexPosition);
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GLES30.glEnableVertexAttribArray(texturePosition);
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GLES30.glUniform1i(samplerTexturePosition, 0);
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// if (textureId != GL.NO_TEXTURE) {
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// GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
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// GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureId);
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// GLES20.glUniform1i(glUniformTexture, 0);
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// }
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onDrawArraysPre();
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GLES30.glDrawArrays(GLES30.GL_TRIANGLE_STRIP, 0, 4);
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GLES30.glDisableVertexAttribArray(vertexPosition);
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GLES30.glDisableVertexAttribArray(texturePosition);
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}
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protected void runPendingOnDrawTasks() {
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while (!mRunOnDraw.isEmpty()) {
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mRunOnDraw.removeFirst().run();
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}
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}
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/**
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* 设置着色器中对象float值
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*/
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protected void setFloat(final int location, final float floatValue) {
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runOnDraw(new Runnable() {
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@Override
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public void run() {
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GLES30.glUniform1f(location, floatValue);
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}
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});
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}
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/**
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* 设置着色器中对象组值float值
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*/
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protected void setFloatVec2(final int location, final float[] arrayValue) {
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runOnDraw(new Runnable() {
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@Override
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public void run() {
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GLES30.glUniform2fv(location, 1, FloatBuffer.wrap(arrayValue));
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}
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});
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}
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/**
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* 设置着色中数组值
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*/
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protected void setFloatVec3(final int location, final float[] arrayValue) {
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runOnDraw(new Runnable() {
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@Override
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public void run() {
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GLES20.glUniform3fv(location, 1, FloatBuffer.wrap(arrayValue));
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}
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});
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}
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/**
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* 设置着色器中对象组值float值
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*/
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protected void setFloatVec4(final int location, final float[] arrayValue) {
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runOnDraw(new Runnable() {
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@Override
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public void run() {
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GLES20.glUniform4fv(location, 1, FloatBuffer.wrap(arrayValue));
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}
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});
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}
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/**
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* 设置着色器中3维矩阵的值
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*/
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protected void setUniformMatrix3f(final int location, final float[] matrix) {
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runOnDraw(new Runnable() {
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@Override
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public void run() {
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GLES20.glUniformMatrix3fv(location, 1, false, matrix, 0);
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}
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});
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}
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/**
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* 设置着色器中4维矩阵的值
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*/
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protected void setUniformMatrix4f(final int location, final float[] matrix) {
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runOnDraw(new Runnable() {
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@Override
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public void run() {
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GLES20.glUniformMatrix4fv(location, 1, false, matrix, 0);
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}
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});
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}
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protected void runOnDraw(Runnable runnable) {
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synchronized (mRunOnDraw) {
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mRunOnDraw.addLast(runnable);
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}
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}
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protected void onDrawArraysPre() {
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}
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protected void glViewport(int x, int y, int width, int height) {
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GLES30.glViewport(x, y, width, height);
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}
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protected void glClearColor(float red, float green, float blue, float alpha) {
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GLES30.glClearColor(red, green, blue, alpha);
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}
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protected void glClear(int mask) {
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GLES30.glClear(mask);
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}
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protected static void glEnableVertexAttribArray(int index) {
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GLES30.glEnableVertexAttribArray(index);
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}
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protected void glDisableVertexAttribArray(int index) {
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GLES30.glDisableVertexAttribArray(index);
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}
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protected int glGetAttribLocation(String name) {
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return GLES30.glGetAttribLocation(mProgram, name);
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}
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protected int glGetUniformLocation(String name) {
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return GLES30.glGetUniformLocation(mProgram, name);
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}
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protected void glUniformMatrix4fv(int location, int count, boolean transpose, float[] value, int offset) {
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GLES30.glUniformMatrix4fv(location, count, transpose, value, offset);
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}
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protected void glDrawArrays(int mode, int first, int count) {
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GLES30.glDrawArrays(mode, first, count);
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}
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protected void glDrawElements(int mode, int count, int type, java.nio.Buffer indices) {
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GLES30.glDrawElements(mode, count, type, indices);
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}
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protected void orthoM(String name, int width, int height) {
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ProjectionMatrixUtil.orthoM(mProgram, width, height, name);
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}
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protected void glVertexAttribPointer(
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int indx,
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int size,
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int type,
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boolean normalized,
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int stride,
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java.nio.Buffer ptr) {
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GLES30.glVertexAttribPointer(indx, size, type, normalized, stride, ptr);
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}
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protected void glActiveTexture(int texture) {
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GLES30.glActiveTexture(GLES30.GL_TEXTURE0);
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}
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protected void glBindTexture(int target, int texture) {
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GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, texture);
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}
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protected void glUniform1i(int location, int x) {
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GLES20.glUniform1i(location, x);
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}
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public int getProgram() {
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return mProgram;
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}
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}
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```
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在Render中改变的地方就是onDrawFrame()方法中去调用Filter.onDraw()方法:
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```java
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@Override
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public void onDrawFrame(GL10 gl) {
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glClear(GLES30.GL_DEPTH_BUFFER_BIT | GLES30.GL_COLOR_BUFFER_BIT);
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adjustVideoSize();
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synchronized (this) {
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if (mUpdateSurfaceTexture) {
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mSurfaceTexture.updateTexImage();
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mUpdateSurfaceTexture = false;
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}
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}
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runAll(mRunOnDraw);
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mFilter.onDraw(mTextureId, mVertextBuffer, mTextureBuffer);
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}
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```
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